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Soloha48 [4]
3 years ago
13

Although the most frequent forms of Down syndrome are caused by a random error, nondisjunction of chromosome 21, Down syndrome o

ccasionally runs in families. Which of the following is the cause of this form of familial Down syndrome?
A) an inversion involving chromosome 21
B) a chromosomal aberration involving chromosome 1
C) too many X chromosomes
D) a translocation between chromosome 21 and a member of the D chromosome group
E) a maternal age effect
Biology
1 answer:
arsen [322]3 years ago
6 0
It would be option a on this case
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